El-Farrash, A.H., Yousef, H.A., Abu El-Ala, A. and Magdy, A. 2016. Assessment of radon level in soil samples from Manzala Lake East Nile Delta, Egypt using passive technique. International Journal of Scientific Reports. 2, 12 (Nov. 2016), 312–318. DOI:https://doi.org/10.18203/issn.2454-2156.IntJSciRep20164308.